Yes. TrainerRoad uses a machine learning model to estimate TSS based on Heart Rate data for your outside rides when a power meter is unavailable or for you runs when you have heart rate data.
How to set up Heart Rate Based TSS Estimation
Step One: Log in to the TrainerRoad website.
Step Two: Select the Account tab and scroll to the bottom of the page. Select TSS Estimation
Step Three: Set your Max Cycling heart rate and whether or not you want TSS automatically estimated for past and future rides or if you would like to make decisions on a case by case basis.
Updating Max Heart Rate and TSS Estimation
You can update your max heart rate and automatic TSS preferences at any time in the TrainerRoad app and the website by returning to these same settings or editing a ride's TSS. To do it through a ride follow these steps:
Step One: Navigate to the Calendar and select the ride you would like to estimate or edit the TSS of.
Step Two: Select the pencil icon in the bottom left hand corner of the ride's detail page.
Step Three: Select the option that says Estimate TSS
Step Four: Make any changes you would like and select Save
Automatic TSS Estimation
If you opt for All past and future rides or future rides only, your TSS will automatically be estimated using heart rate data when power data is not available and heart rate data is available. If you would ever like to manually adjust a rides TSS estimation when you have this setting on you will need to swap over to the "I Will Decide Per Ride" option in these same settings. You can adjust this setting as well as your maximum heart rate at any time.
Estimating TSS for Past Rides
If you opt to estimate TSS for past rides you will be prompted to confirm this choice before saving your TSS estimation settings.
Estimating TSS for Individual Rides
If you opt to decide per ride whether you would like to use heart rate or RPE to estimate TSS you will be presented with the option to manually estimate your TSS on any of your rides without power data. If you would prefer to use heart rate for a ride you can select Heart-Rate Based tab under Training Stress:
If you would like to use RPE-Based TSS estimation on a particular ride instead you can swap over to the RPE-Based option and select the rides intensity for an RPE based TSS estimate